The Origin of a Peculiar Extra U(1)

Abstract

The origin of a family-independent "extra U(1)", discovered by Barr, Bednarz, and Benesh and independently by Ma, and whose phenomenology has recently been studied by Ma and Roy, is discussed. Even though it satisfies anomaly constraints in a highly economical way, with just a single extra triplet of leptons per family, this extra U(1) cannot come from four-dimensional grand unification. However, it is shown here that it can come from a Pati-Salam scheme with an extra U(1), which explains the otherwise surprising cancellation of anomalies.

9 pages, RevTeX4; changed content, added references

References in corpus (2)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Z-prime Gauge Bosons at the Tevatron

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• Recent Neutrino Data and Type III Seesaw with Discrete Symmetry
• Anomaly-free U(1) gauge symmetries in neutrino seesaw flavor models
• Spontaneous R-parity violating type III seesaw
• Anomaly-free constraints in neutrino seesaw models
• Neutrino Masses and Leptogenesis from Extra Fermions
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• Hierarchical Quark and Lepton Masses with Sequential U(1) Gauge Symmetry